Gas burner



May 7, 1940;

E. F. GORMAN GAS BURNER Filed Oct. 18, 1938 .INVENTOR EARL FGORMA'N BY Id Silk/552% ATTORNEY Patented- May 1,, 1940 PATENT men GAS BURNER EarlF. Got-man, Philadelphia, Pa., alfllmr to Y r The Selas Company,Philadelphia, Pa., a corporation of Pennsylvania Application Qctober 18,ms, Serial No. 235,556

4 Claims.

plications of Frederic Hess, Serial No. 713,433,

filed March 1, 1934, and Serial No. 195,950 filed lfl March 15, 1938, inwhich thin ceramic plates with grooves in their sides are arranged side,by side to form an elongated orifice wall at one side of the burner fuelchamber, having its orifices formed by said grooves.

1.7 In its preferred form, my improved burner comprises'a flat metalbarextending into the burner through the corresponding end wall 'of thefuel 'chamber and having one side bearing against the burner oriiicewall and longitudinally n adjustable to cover the burner wall orificesfor a greater or lesserportion of the length of the burner. In itspreferred form, also, the burner .oriijice wall comprises-ceramic plateswhich not only have orifice grooves in their sides, as in said 3' priorapplications, but are also recessed at their inner ends, to form dirtreceiving grooves in the innerside -of the orifice wall, into which theorifice grooves open, and which are of greater extent than the orificegmovesin the direction of theburner length. and other burner dirtaccumulating on the inner side of the orifice wall, may then be forcedinto the, dirt receiving grooves, when said member is moved to closesome of the orifices, without forcing dirt into and 35 thereby chokingthe orifices so'closed.

The various featuresv of novelty, which char-- acterize my invention arepointed out with particularity in the claims annexed to and forming apart of this specification. For a better under-' 49 standing of theinvention, however, its advantages and specific objects attained withhouse, reference should be had to the accompanying drawing anddescriptive matter in which 1 have illustrated and described a preferredembodiment of theinvention.

, Of the drawing:

Pig. 1 is an elevation partly broken away and in section of a burnerconstructed in accordance with the present invention; v r so Fig. 2 is atransversesection on theline 2-2 of 1; and 1 j I I Fig. Sisa'perspective view of one of the ceramic I platesemployedinthe'burnersshowninl'igal and 2 The burner shown in the drawing comprises i A (Cl.158-116) The general object of the present invention is a metallictubular burner body, or manifold, A, having removable end heads B, andformed at one side with a longitudinally extending slot like outlet Afrom the fuel space A within the burner body. The fluid fuel, ordinarilya. com- 5 bustible mixture of air and gas; is supplied to the space A"through a supply pipe C connected-rte one of the end heads B. As shown,theportions of the burner body adjacent the sides of the slot A are,thickened and shaped to provide a. seat or corner recess A at each sideof the slot, to receive a corresponding comer portion of each of themultiplicity of relatively thin ceramic plates D which extend acrosstheslot A', and.

collectively form a wall closing "said slot,'except iii opposingparallel surfaces of, the recesses A.

The portion of the plate more remote" from the slot A is of smallerwidth, so that each plate is thus provided at each side of the slot A,with.

a projection D received in the corresponding recess A, and adapted to besecured in said recase by a corresponding clamping member E. As shown.each member E is a metal angle bar hav- I in: one fiange'held against abearing surface A on the burner body by clamping bolts E, and having itsother flange in reinforcing contact with the corresponding edges of thereduced width portions'oi' the plates D. As shown, a gasket c isinterposed between each clamping plate E and the corresponding portionsD of the 86 platesD. k g

As shown, the end of each plate D remote from the slot A is formed witha notch, and the notches of the diflerent plates, collectively forms.trough-shaped combustion space D in, and ex,- 40

' tending longitudinally of, the burner wall formed by plates D. Theside walls of the space Dar'e formed by integral portions D of theplates D.

As shown, each plate D is formed with a plurality of orifice grooves Dat each side and the grooves at each side of the plate are in staggeredrelation with those at the other, so that in the burner wall formed bythe assembled similar plates D, the open side of each burner orifice 5ogroove D formed in one plate, is closed by an ungrooyed portion of thesurface of the adjacent plate D. e v e In so'far as above described, theburner dis closed herein comprises nothing novel with me, 5

cations.

but is of 'the type disclosed in said prior appli- In accordance withthe present invention, the portion of the burner body at each side ofthe slot A and at the inner side of the adjacent corner recess A isformed with a corner recess The walls of the two recesses A and theadjacent edges of theplates D form a guideway for one or more flamestops or sliding valves F. As shown, the burner is provided with twovalves F, one extending through each burner head end B, and each in theform of a flat bar of metal,

ordinarily brass and rectangular in cross section. As shown each valve Fis provided at its outer end with a handle F adapted for engagement bythe hand of an operator to adjust the valve longitudinally of theburner. Such valve adjustment varies the efiective length of the burner,since each end portion of the orifice wall having its orifice grooves Doverlapped by the corresponding valve F, is rendered inoperative. Theeffective length of the burner is therefore equal to the distancebetween the adjacent ends of the two valves F. As shown, each end memberB is formed with a chambered boss B, which in conjunction with thegland- G provides a leakage preventing stufling box, through which thecorresponding valve F extends.

-While the burner orifice grooves D may vary in cross section inaccordance with the burner capacity and burner operating conditions, thegrooves are always relatively minute, being ordinarily about onethirty-second of an inch deep and are usually square. To avoid risk ofhaving the inner ends of the small orifice grooves D closed by furnacedirt or dust accumulating on the irmer edges of the plates D, andscraped off by each valve F when the latter is moved in the direction toshorten the effective length of the burner, 1 form dirt receivinggrooves D in the inner side of the burner wall formed by the ceramicplates D. As shown, each dirt receiving groove D is formed by cuttingaway an inner edge portion of a corresponding plate D, to form a cornerrecess'extending into the plate from the inner end and from one side ofthe latter. Each such recess extends into the plate from its side for adistance substantially greater than the corresponding dimension or depthof each of the orifice forming grooves D. Each groove D is ofsufl'icient length, to communicate with each of the orifice grooves Dformed in the same side of the same plate D, and with the orifices D inthe adjacent side of the immediately adjacent plate With the describedconstruction, when each valve member F is moved in the direction toshorten the efiective length of the burner. accumulated dirt scraped offthe inner side of the orifice wall by the advancing end of the valvemember is pushed into may accumulate in the latter in relativelysubstantial amounts without closing or choking the corresponding orificegrooves as those grooveswould be closed or choked by the dirt if thegrooves D were'not provided. In consequence when the valve member isgiven a reverse adjustment, the efiective'length of the burner isincreased as it could not be'if its first mentioned adjustment hadchoked the grooves D' over which the valv was then moved.

The improved burner construction is characterized not only by the meansjust described for preventing the burner orifices from being choked bydirt forced into them in decreasing the efiecthe corresponding grooves Dand tive length of the burner, but also by the simplicity andeflectiveness of the valve means provided to adjust the valve length.

While in accordance with the provisions of the statutes, I haveillustrated and described the best form of embodiment of my inventionnow known to me, it will be apparent to those skilled in the art thatchanges may be made in the form of the apparatus disclosed withoutdeparting from the spirit of my invention as set forth in the appendedclaims and that in some cases certain features of myinvention may beused to advantage without a corresponding use of other features.

Having now described my invention, 'what- I claim as new and desire tosecure by Letters Patent, is:

l. A gas burner comprising an elongated fuel chamber with burnerorifices formed in a portion of its wall extending longitudinally of thechamber, and with an opening in an end wall of said chamber, a memberextending into said chamber through said opening and comprising a fiatbar portion within said chamber and bearsing at one side againsttheinner sideof said wall portion and adjustable longitudinally of theburner to open and close more or lessor said orifices and thereby varythe effective length-of said burner.

2. A gas burner comprising a burner body formed with a fuel chamber openatone end and comprising an elongated burner orifice wall at one side ofsaid chamber, with burner orifices distributed along the length ofsaidwall, an end head closing the open end of said fuel'chamber andformed with an opening, a flat metal bar extending into the fuelchamberthrough said open-' ing-and having one sidein engagement with theinner side of said orifice wall and adjustable longitudinally of thelatter, whereby more or less of said'orifices are closed by said bar,depending on the longitudinal adjustment thereof, and stufling box meanscarried by said end head and surrounding said member. and preventingleakage along the latter through said opening.

3. A gas burnercomprising an elongated fuel chamber with burner orificesformed in a portion or its wall extending longitudinally of the chamber,and a member extending into said chamber at one end of the latter andcomprising a barlike portion within said chamber bearing at one sideagainst the inner side of said wall portion and adjustablelongitudinally of the burner to open and close more or less of saidorifices and thereby vary the effective lengthof said burner, said wallportion being formed with grooves at its inner, side into each of whichthe corresponding orifices open and each of greater extent in thedirection of the length of the burner than the orifices opening thereto,whereby dirt scraped ofi of said wall by said member their sides seatedon said'body and extending. across said slot with said grooves open atone' end to and extending away from said, chamber andforming-burner-orifices.in a bumer v wall collectively formed by saidplates, a sliding memberengaging' the/inner side of said wall and,"

movable along the latter'in a direction transverse to the sides of said.plates" to. extend across more, or less or said orifices and thereby,vary the cil'ective length ,of said burner,xsaid plates beinz'recessedat their ends adjacent said chamher to provide dirt receiving Irooves atthe inner side oi said wall into each of which the inner ends ofadjacent orifices open and each of which is 01' greater-extent in thedirection of movement of said member than the orifice grooves openingthereto, whereby dirt scraped on! of said well by the advancing end-orsaid'member in' the adjacent of. thelatter may collect in said dirtreceivin: :rooves without choking said orifices.

man 1003mm.

